That's exactly what I'm saying....... Not many PT's qualified as ace's in WWII I'm sure.......
Generally Pts, in the war, avoided daylight and certainly other PTs and/or aircraft. If I remember right the German navy forbid their own motor boats from engaging other PTs. To them their S Boats were important assets to be used to sink large enemy combat ships, or, enemy freighters. Generally, in all navies, PT boats avoided daylight like Dracula. And night isn't something we have in the game so while fun I dont think the PT will ever achieve its potential in game play. I like to use them as additional flak for our CVs. Or as escorts for LVTs. Or, of course, to fling torpedoes at enemy ships.
I have found that it isn't worth it to conserve ammo against fighter cons. I stay pretty finger heavy with a few squirts at 2k to get my lead and by 1k to 1.5k I want to be on the plane with all guns firing. Best of all I like having a few PTs with me.
It was the Brits who mastered the art of near missing ships on purpose with rockets. I forget the distance they preferred to miss by but it was a deadly tactic against submarines and commercial shipping. Sinking PTs by near misses of rockets and/or big cannon is very accurate modeling.